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经营范围
发明名称
Cordless switchboard
摘要
申请公布号
US3176081(A)
申请公布日期
1965.03.30
申请号
US19600023086
申请日期
1960.04.18
申请人
INTERNATIONAL TELEPHONE AND TELEGRAPH CORPORATION
发明人
DUNCAN ROBERT H.;MILLER THOMAS P.
分类号
H04M3/60;H04Q3/00
主分类号
H04M3/60
代理机构
代理人
主权项
地址
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